Hello, My husband and I are wanting to rent a car in London on a Sunday, Oct. 20th and travel to our next destination in Broadwell, Stow on the Wold. We will be staying there until the 24th. Not sure of the best place for easy pick up and return in London. We will be leaving from London on the 24th to go to Paris from the Pancras train station. On the 20th we will be staying at the Radisson Blu Vanderbilt hotel which is in South Kensington area. Any ideas?